body {
  color: white;
  background-color: black;
  background-image: url(black_marble_diamond.jpg);
  background-position: center center;
  background-size: cover;
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px;
}
a:link, a:visited {
  color: goldenrod;
  text-decoration: none;
}
a:link:hover, a:visited:hover {
  color: goldenrod;
  text-decoration: underline;
}
div { 
  display: flex;
  padding: 0px 29%;
  height: 100%;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin: 0px;
}